>> [Actually the ones I have are infuriatingly reluctant to work 
>> properly, but still...]
> 
> Hmmm mine work fine with a simple snap.

Mine seem to require several snaps before they "work". Depending on how 
lucky you are. (The brand-name one my mum used to have always seemed to 
work first time.)

>> Plus, every time you say "super-saturated salt solution" you get +4 
>> aliteration points! :-D
> 
> Double that if you know what it means :-)

Even if you say "super-saturated sodium sulphate solution" it works! :-D

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

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